Fix FTBFS by not compile X.org-1.19 drv, we don't use it, just need in el <= 7
--- ./src/VBox/Additions/x11/vboxvideo/Makefile.kmk.orig	2016-10-11 02:49:23.184986182 +0100
+++ ./src/VBox/Additions/x11/vboxvideo/Makefile.kmk	2016-10-11 02:49:39.879176964 +0100
@@ -376,7 +376,7 @@ vboxvideo_drv_118_SOURCES := $(vboxvideo
 
 ifdef VBOX_USE_SYSTEM_XORG_HEADERS
  # Build using local X.Org headers.  We assume X.Org Server 1.7 or later.
- DLLS    := $(filter-out vboxvideo_drv_%,$(DLLS)) vboxvideo_drv_system
+ DLLS    := $(filter-out vboxvideo_drv_%,$(DLLS))
  SYSMODS := $(filter-out vboxvideo_drv%,$(SYSMODS))
  vboxvideo_drv_system_TEMPLATE = VBOXGUESTR3XORGMOD
  vboxvideo_drv_system_CFLAGS := \
